Java写串口

用Java上位机给单片机写串口指令，简单可用代码如下：

import java.io.InputStream;
import java.io.OutputStream;
import javax.comm.*;
public class test
{
    public static void main(String args[]) throws Exception
    {
        CommPortIdentifier serialPortId = CommPortIdentifier.getPortIdentifier(“COM3”);
        SerialPort  port = (SerialPort) serialPortId.open(“Read”, 30);
        //打开COM3串口，其中30是打开串口的超时时间
        port.setSerialPortParams(9600, 8, 1, 0); //设置COM2的波特率，数据位，停止位，校验方式
        //从串口中得到输入输出流了
        byte[] buffer = {0x0F,0x01,0x00};//controlling command
        OutputStream out = port.getOutputStream();
        out .write(buffer);
        out .flush();
        InputStream in = port.getInputStream();
        in.read(data); //data是一个byte[]
    }
}

Reference

[1].http://blog.csdn.net/pigteacher/article/details/5619955